delete unused XContentStructure class
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javanna
Luca Cavanna
parent
484fcd49e5
commit
5cc423a229
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@ -1,140 +0,0 @@
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/*
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* Licensed to Elasticsearch under one or more contributor
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* license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright
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* ownership. Elasticsearch licenses this file to you under
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* the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.index.query.support;
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import org.apache.lucene.search.Query;
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import org.elasticsearch.common.Nullable;
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import org.elasticsearch.common.bytes.BytesReference;
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import org.elasticsearch.common.xcontent.XContentFactory;
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import org.elasticsearch.common.xcontent.XContentHelper;
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import org.elasticsearch.common.xcontent.XContentParser;
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import org.elasticsearch.index.query.QueryShardContext;
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import org.elasticsearch.index.query.QueryParseContext;
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import java.io.IOException;
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/**
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* XContentStructure is a class used to capture a subset of query, to be parsed
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* at a later time when more information (in this case, types) is available.
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* Note that using this class requires copying the parser's data, which will
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* result in additional overhead versus parsing the inner query/filter
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* immediately, however, the extra overhead means that the type not be
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* extracted prior to query parsing (in the case of unordered JSON).
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*/
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//norelease we should be able to delete this class once all queries are refactored
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public abstract class XContentStructure {
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private final QueryParseContext parseContext;
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private BytesReference innerBytes;
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/**
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* Create a new XContentStructure for the current parsing context.
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*/
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public XContentStructure(QueryParseContext queryParseContext) {
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this.parseContext = queryParseContext;
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}
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/**
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* "Freeze" the parsing content, which means copying the current parser's
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* structure into an internal {@link BytesReference} to be parsed later.
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* @return the original XContentStructure object
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*/
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public XContentStructure freeze() throws IOException {
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this.bytes(XContentFactory.smileBuilder().copyCurrentStructure(parseContext.parser()).bytes());
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return this;
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}
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/**
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* Set the bytes to be used for parsing
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*/
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public void bytes(BytesReference innerBytes) {
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this.innerBytes = innerBytes;
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}
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/**
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* Return the bytes that are going to be used for parsing
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*/
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public BytesReference bytes() {
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return this.innerBytes;
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}
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/**
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* Use the captured bytes to parse the inner query using the specified
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* types. The original QueryParseContext's parser is switched during this
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* parsing, so this method is NOT thread-safe.
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* @param types types to be used during the inner query parsing
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* @return {@link Query} parsed from the bytes captured in {@code freeze()}
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*/
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public Query asQuery(String... types) throws IOException {
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BytesReference br = this.bytes();
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assert br != null : "innerBytes must be set with .bytes(bytes) or .freeze() before parsing";
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XContentParser innerParser = XContentHelper.createParser(br);
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String[] origTypes = QueryShardContext.setTypesWithPrevious(types);
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XContentParser old = parseContext.parser();
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parseContext.parser(innerParser);
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try {
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return parseContext.parseInnerQuery();
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} finally {
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parseContext.parser(old);
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QueryShardContext.setTypes(origTypes);
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}
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}
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/**
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* InnerQuery is an extension of {@code XContentStructure} that eagerly
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* parses the query in a streaming manner if the types are available at
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* construction time.
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*/
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//norelease we should be able to delete this class once all queries are refactored
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@Deprecated
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public static class InnerQuery extends XContentStructure {
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private Query query = null;
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private boolean queryParsed = false;
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public InnerQuery(QueryParseContext parseContext1, @Nullable String... types) throws IOException {
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super(parseContext1);
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if (types != null) {
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String[] origTypes = QueryShardContext.setTypesWithPrevious(types);
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try {
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query = parseContext1.parseInnerQuery();
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queryParsed = true;
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} finally {
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QueryShardContext.setTypes(origTypes);
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}
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} else {
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BytesReference innerBytes = XContentFactory.smileBuilder().copyCurrentStructure(parseContext1.parser()).bytes();
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super.bytes(innerBytes);
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}
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}
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/**
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* Return the query represented by the XContentStructure object,
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* returning the cached Query if it has already been parsed.
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* @param types types to be used during the inner query parsing
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*/
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@Override
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public Query asQuery(String... types) throws IOException {
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if (!queryParsed) { // query can be null
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this.query = super.asQuery(types);
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}
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return this.query;
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}
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}
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}
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